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Extending the life of an aluminum smelter pot. Refer to the American Ceramic Society Bulletin (February 2005) study of bricks that line aluminum smelter pots, Exercise. You fit the simple linear regression model relating brick porosity (y) to mean pore diameter (x) to the data in the SMELTPOT file
(a) Find an estimate of the model standard deviation, σ.
(b) In Exercise, you predicted brick porosity percentage when x = 10 micrometers. Use the result, part a, to estimate the error of prediction.
Exercise (d) Predict the apparent porosity percentage for a brick with a mean pore diameter of 10 micrometers.
the top nine scores on a test are as follows24 28 30 37 44 49 49 53 63please find the standard deviation and show your
If a part-time receptionist had been employed, who worked 19 hours each week, what would the mean and standard deviation of the remaining overtime have been?
the supplies for the construction of a reinforced concrete building are supplied by the company a and b. the company a
Find the probability that (i) the student took mathematics or history; (ii) the student does not take either of these subjects.
A legislative aide is doing research on the duration of calls initiated on car cellular phones. A preliminary study showed that the standard deviation of these calls is 1.6 minutes.
The choices are to be designated by the letter a, b, c, d, and e. The professor wishes to use a random-number table to determine which letter choice should correspond to the correct answer for a question. Using the number correspondence 1 for a, 2 fo..
According to data from the Tobacco Institute Testing Laboratory, Camel Lights King Size cigarettes contain an average of 1.4 milligrams of nicotine. An advocacy group commissions an independent test to see if the mean nicotine content is higher th..
Camyo Manufacturing produces four parts that require the use of a lathe and a drill press. The two machines operate 10 hours a day. The following table provides the time in minutes required by each part:
What is the probability that 25% or fewer male employees will indicate that they have to pick up the slack for moms working flextime?
Use your results from #2 as estimates for μ and σ. Find the probability that a sample of 36 statistics students at DTCC has a height of 65 inches or taller.
An Auditor of a small bsuiness has sampled 50 of 700 accounts. The sample mean total receivables is $435, and the sample standard deviation is $86. Find a 95% confidence interval for the total amount of receivables.
Ten pairs of points yielded a correlation coefficient y of 0.79. If a=0.05, which of the following statements is correct if H 0:P=0? (Do not calculate a t-value.)
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